This is a discussion on Internal or External waste gate for turbo within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Ok i am going to get a new turbo and i want to know if i can get a Externaly ...

Internal or External waste gate for turbo

Ok i am going to get a new turbo and i want to know if i can get a Externaly waste gated turbo and what do i need fo it to work properly and please let me know if i need to have a internaly waste gated turbo for my 13' wrx

There are a lot of things to consider when thinking about going to an EWG setup. First and foremost, it can be done to any turbo, even one like your vf52 with a stock IWG. The way to do it is to either take the turbo to a shop and have them block off the internal wastegate, or, I believe, buy the IWG block off from grimmspeed. Then, you will need a new uppipe designed for an external wastegate, a lot of brands make them, and they are easy to find used on the forums as well. Next, you need to decide on a wastegate, for most setups a 38mm WG is suffucient, and I personally prefer Tial.

Now, once all of that is done, bought, and ready for install, you need to decide one more thing. Where do you want your wastegate gases to go? Many people just run a dumptube from the wastegate, this is what gives that awesome loud sound of an ewg. There are some pros and cons to dumping your wastegate gases directly into the atmosphere though.
PROS: Sound
Cost (wont have to replace downpipe)
Will make most power this way

Your other option, run everything as described before, but instead of a dump tube from the wastegate, the wastegate gases are directed back into your downpipe and exhaust gases. You would need a new downpipe made specifically for a EWG setup in order to this. They can be a bit pricey depending on what brand and where/who you get it from.

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